SoundCraft Audio Mixing Console Model Spirit Studio User manual

Brand: SoundCraft

Model: Audio Mixing Console Model Spirit Studio

Category: Musical Instruments

Type: User manual

This manual is also suitable for

Spirit Monitor

Issue 1 (first draft)

Part No. ZZ2686

Information in this manual is subject to change without

notice and does not represent a commitment on the part

of the vendor. Soundcraft Electronics Ltd. shall not be

liable for any loss or damage whatsoever arising from

the use of information or any error contained in this

manual.

No part of this manual may be reproduced, stored in a

retrieval system, or transmitted, in any form or by any

means, electronic, electrical, mechanical, optical,

chemical, including photocopying and recording, for any

purpose without the express written permission of

Soundcraft Electronics Ltd.

It is recommended that all maintenance and service on

the product should be carried out by Soundcraft

Electronics Ltd. or its authorised agents. Soundcraft

Electronics Ltd. cannot accept any liability whatsoever

for any loss or damage caused by service, maintenance

or repair by unauthorised personnel.

Soundcraft Electronics Ltd.

Unit 2

Borehamwood Ind Park

Rowley Lane

Borehamwood

Herts.

WD6 5PZ

England

User Guide

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . 2

Basic Principles of Multitrack Recording . . . . . . . 4

Getting Started . . . . . . . . . . . . . . . . . . . 6

Connections and Connectors . . . . . . . . . 6

Fault Finding Guide . . . . . . . . . . . . . . 9

Getting to know your console . . . . . . . . . . 10

Facilities . . . . . . . . . . . . . . . . . . . 10

Input - Channel Path . . . . . . . . . . . . . 10

Input - Monitor Path . . . . . . . . . . . . . 15

Group Section . . . . . . . . . . . . . . . . 16

Master Section . . . . . . . . . . . . . . . 18

Using your SPIRIT STUDIO Console . . . . . . . 21

Initial Set Up . . . . . . . . . . . . . . . . . . . 21

Applications . . . . . . . . . . . . . . . . . . . 24

Recording . . . . . . . . . . . . . . . . . . 24

Playback/Mix-Down . . . . . . . . . . . . . 25

Overdubbing . . . . . . . . . . . . . . . . 26

Live P.A. . . . . . . . . . . . . . . . . . . 27

Care of your mixer . . . . . . . . . . . . . . . . 28

Glossary . . . . . . . . . . . . . . . . . . . . . 28

Selectable Options . . . . . . . . . . . . . . . . 30

Specifications . . . . . . . . . . . . . . . . . . . 31

Front Panel Layout . . . . . . . . fold out rear cover

Block Diagram . . . . . . . . . . . inside rear cover

Page 1

INTRODUCTION

Congratulations on your purchase of a SPIRIT STUDIO

mixer. Owning a Soundcraft console brings you the

expertise and support of one of the industrys leading

manufacturers and the results of over 17 years experi-

ence supporting some of the biggest names in the

business. Packed full of features for track-laying,

mixdown and overdubbing SPIRIT STUDIO provides

you with access to the full range of professional mul-

titrack techniques from an unusually compact mixer.

needs of musicians, SPIRIT STUDIO has been built to

the highest standards using quality Japanese compo-

nents and employing automated assembly techniques

beyond the reach of most manufacturers of compact

mixers.

A rugged steel chassis is combined with moulded side

trims to give protection and distinctive appearance.

Custom-moulded controls, designed for the best feel

and visual clarity complement the styling, resulting in a

truly professional product which is ideal for all types of

multitrack recording from 8-track all the way up to 24-

track.

An in-line console available in two frame sizes (16/8/2

and 24/8/2) there is no shortage of inputs on SPIRIT

STUDIO, since in mixdown mode the multitrack moni-

tor inputs double as extra line inputs.

The input channels are able to accept a wide range of

Microphone and Line level signals from separate input

sockets. Every channel features a separate Channel

and Tape Monitor section, with unique flexibility to

swap functions between the two paths. The 4-band EQ

is in two sections - normally the HL/LF section is be-

fore the insert point and the LOW MID and HI MID after

the insert point, thus allowing separate EQ of Send and

Return. If EQ to Monitor switch is pressed the HF/LF

EQ is switched into the Monitor path leaving the LOW

MID and HI MID section after the Insert point in the

Page 2

Channel path. The Auxiliary Sends are similarly split to

give 1 Foldback and 2 Auxiliary sends in both the

Channel and Monitor paths, or all four Auxiliary sends

may be assigned to the Channel path.

The Monitor fader is normally a rotary control, but an

INPUT REVERSE switch swaps Channel and Monitor in-

puts, allowing the tape return signal to be brought

down the full facilities of the Channel path and mixed

on the long throw channel fader. The Channel PAN

control drives a matrix of routing switches to feed the

signal to 8 Groups in stereo pairs, plus the Stereo mix.

The Group masters are arranged as pairs, and the out-

puts are normalled to the respective Tape Sends on the

input channels in blocks of eight unless the Channel DI-

RECT switches are pressed. The Group output is also

available on a separate jack socket for use as an extra

send during mixdown. Groups may be routed as odd

and even pairs to the Stereo mix, or as combined

MONO feeds. Each group has a 16-segment LED bar-

graph meter.

Above the Group masters are 4 Stereo Effects Returns,

with balanced inputs, 2-band shelving EQ and feeds to

the two Foldback busses, the Stereo mix or summed

to the local Groups in stereo.

The Master section comprises the control room moni-

toring facilities, Oscillator with two fixed frequencies,

Talkback and Stereo mix and AFL/PFL metering.

A full description of all facilities in Getting to know your

console can be found on page 10.

SPIRIT STUDIO is designed to be as user-friendly as

possible, but a few minutes spent reading through this

manual will help you become familiar with the product

away from the pressure of a recording session, and al-

low you to gain full benefit from the superb

performance offered by your new mixer.

Above all, remember that your SPIRIT mixer is de-

signed to extend your creativity. The more you explore

the controls and the effect they have on the sound out-

put, the more you will appreciate how you can

influence and enhance the final sound, both by careful

and creative balancing of channels and the use of

Page 3

BASIC PRINCIPLES OF RECORDING

The MixerThe Mixer As one would expect, the main purpose of the mixer is

to combine sounds, but under precise and smooth

control. This is why long-throw faders are essential on

any professional product. The faders provide you with

total control of the final sound at your finger tips and

like an artist playing an instrument you should listen to

your fader movements, not look at your hands.

Your SPIRIT STUDIO mixer accepts a wide range of in-

put signals via a microphone input, for very low level

signals, or a line input, for higher level signals from, for

instance, tape machines, effects processors, etc.

The mixer is split into two sections. The Inputs receive,

match and process individual source signals, and dis-

tributes them at precise mix levels to a choice of

outputs. The Master and Group sections allow overall

level control of all outputs, and provides monitoring of

the audio signal at many points in the mixer, either on

headphones or meters.

The Equaliser controls are the most flexible and poten-

tially destructive feature of the mixer. They have a

similar effect on the frequency response of the input

channel as the tone controls on a hi-fi system, but with

much greater precision, and allow particular charac-

teristics of the input signal to be emphasised or

reduced. It is very important that you become familiar

with the effect each control has on the sound and this

is best achieved by spending time listening to the effect

of each control on a well-known track played through

the mixer.

The Auxiliary Sends provide a way of routing the input

signals to a number of secondary outputs, for artists

foldback, echo units or additional speaker outputs.

The Pan control adjusts the position of the input signal

within the stereo mix, and can be swept from full left,

through to full right. This allows particular artists to re-

tain their correct spatial position within the mix,

particularly important for stereo recording.

Pre-Fade-Listen(PFL) allows you to monitor the signal

at many points in the mixer. Pressing any PFL switch

places the signal at that particular point onto the control

room outputs (or headphones if plugged in) and the

Page 4

right meter. This allows the engineer to check the qual-

ity of the signal or to pin-point problems. Using PFL

will not affect the signals on the Left and Right Mix out-

puts.

Each input channel and the Group and Mix outputs

have an Insert A gauge jack socket, which is a break

point in the signal path. It allows the signal to be taken

out of the mixer, through an external piece of equip-

ment and then back into the mixer directly after its

original exit point. The Insert point is normally by-

passed by the A gauge jack socket contacts, and is

only brought into operation when a plug is inserted.

Typical uses would include Effects Processors, Limiters

or additional Equalisers.

The terms PRE and POST are often used in the context

of Inserts, Equalisers and Auxiliary Sends, and describe

whether that facility is placed before (Pre) or after (Post)

another particular section. This is explained further in

the detailed description of facilities.

A mixer is often judged, amongst other factors, by the

amount of Headroom available. This is a measure of

the reserve available to cope with sudden peaks in the

input signal, without distortion caused by Clipping,

when the signal becomes so high that it would exceed

the power supply rail voltages and is as a result limited.

This commonly occurs where gain settings are incor-

If the signal level is too low it may be masked

by the noise.

Signal

Noise

If the signal level is too high, clipping distortion

may occur.

Clipped

Signal

Noise

Page 5

rectly set or where sources are improperly matched to

the mixer input. If the source signal is too high, clipping

and distortion results. If the signal is too low it be-

comes masked by the background noise which is

present to some degree in all mixers. The diagram be-

low illustrates this point.

It is during recording that the greatest demands are

made on a mixer in terms of transparency and audio

quality. While a stereo recording will often be made di-

rect to the master tape machine, multitrack machines

provide greater flexibility by allowing the recording to

be done in three stages. The first stage is Tracking in

which individual voices or instruments, or groups of in-

struments are recorded as cleanly as possible on

selected tracks on the multitrack machine. The second

GETTING STARTED

CONNECTIONS AND CONNECTIONS AND

CONNECTORSCONNECTORS

Although this may seem a simple subject, faulty con-

nectors and cabling are the source of most sound

system problems. Correctly-made cables of the proper

type, with the right connectors for the job will ensure

peak performance from your system with minimum

noise pick-up. The following section will help you to

connect SPIRIT STUDIO mixer correctly.

Two different types of audio connectors are used, 3-pin

XLR and

⁄

" three pole (A gauge) jacks. These are

Balanced

Input

2. Hot(+ve)

3. Cold(-ve)

1. Screen

Page 6

used in several configurations as shown in the dia-

grams below.

Balanced and Balanced and

UnbalancedUnbalanced

All channel inputs are balanced, i.e. there are separate

+ve(hot) and -ve (cold) wires for each signal plus a

ground. The design of the differential input amplifiers is

such that interference picked up on these wires is can-

celled out. This is because, since both wires are in

close proximity, the same interference will be picked

up on each wire and balanced input amplifiers will only

amplify the difference between +ve(hot) and -ve(cold).

Any signal on both hot and cold (i.e. noise) will not be

amplified - this is known as common mode rejection

(CMR.). If using an unbalanced source into a balanced

input, it is a good idea to connect the source ground to

the negative input. Should the source device have no

connection to mains ground, then connect the shield at

both ends. If there is a connection to mains ground,

then the shield should only be connected to the source

device ground.

Note: many modern audio/musical instruments have

electronically balanced outputs which should not be

unbalanced by shorting one wire to ground. Always

use your inputs balanced where possible.

The mix, group and auxiliary outputs are ground com-

pensated and provide a very effective way of

optimising noise immunity, without the cost and com-

plexity of balanced outputs. These outputs employ

ground compensation techniques to cancel out the ef-

fects of variation in ground potential between the mixer

3 POLE (stereo) JACK 2 POLE (mono) JACK

Tip

Ring

Sleeve

Hot(+ve)

Cold(-ve)

Screen

Left Signal

Right Signal

Ground

Send

Return

Screen

Signal

Ground

Tip

Ring

Sleeve

Insert Points Line Input

Aux Outputs

FX Returns

Headphones Unbalanced

Input

Page 7

and other equipment which would otherwise show up

as hum. If the output is driving a device or amplifier

that has an unbalanced input, connect the -ve(cold) sig-

nal to the ground at the destination, not at the output of

your SPIRIT STUDIO console.

PolarityPolarity You will probably be familiar with the concept of polar-

ity in electrical signals and this is of particular

importance to balanced audio signals. Just as a bal-

anced signal is highly effective at cancelling out

unwanted interference, so two microphones picking up

the same signal can cancel out, or cause serious deg-

radation of the signal if one of the cables has the +ve

and -ve wires reversed. This phase reversal can be a

real problem when microphones are close together and

you should therefore take care always to connect pins

correctly when wiring audio cables.

Source

Input

GND

LINK

GND

LINK

GND

LINK

BALANCED TO BALANCED

UNBALANCED TO BALANCED

UNBALANCED TO UNBALANCED

If ground link absent, or mains earth isolated from

source ground, then connect shield at both ends

Grounding and Grounding and

ShieldingShielding

For optimum performance it is vital that all signals are

referenced to a solid, noise-free earthing point and that

all signal cables have their screens connected to

ground. To avoid earth loops, use balanced connec-

tions where possible and ensure that all cable screens

and other signal earths are connected to ground only at

their source and not at both ends.

Page 8

Avoid running audio cables or placing audio equip-

ment, close to thyristor dimmer units or power cables.

Noise immunity is improved significantly by the use of

low impedance sources, such as good quality profes-

sional microphones or the outputs from most modern

audio equipment. Avoid cheaper high impedance mi-

crophones, which may suffer from interference over

long cable runs, even with well-made cables.

Fault Finding GuideFault Finding Guide Repairing a sound mixing console requires specialist

skills, but basic Fault Finding is within the scope of any

user if a few basic rules are followed.

• Get to know the Block Diagram of your console (see

inside rear cover)

• Get to know what each component in the system is

supposed to do.

• Learn where to look for common trouble spots.

The Block Diagram is a representative sketch of all the

components of the console, showing how they con-

nect together and how the signal flows through the

system. Once you have become familiar with the vari-

ous component blocks you will find the Block Diagram

quite easy to follow and you will have gained a valu-

able understanding of the internal structure of the

console.

Each Component has a specific function and only by

getting to know what each part is supposed to do will

you be able to tell if there is a genuine fault! Many

faults are the result of incorrect connection or control

settings which may have been overlooked.

Basic Troubleshooting is a process of applying logical

thought to the signal path through the console and

tracking down the problem by elimination.

• Swap input connections to check that the source is

really present. Check both Mic and Line inputs.

• Eliminate sections of the channel by using the insert

point to re-route the signal to other inputs that are

known to be working.

Page 9

GETTING TO KNOW YOUR CONSOLE

FACILITIESFACILITIES

Refer to the fold-out front panel diagram at the rear of this

manual, which shows the control functions on the SPIRIT

STUDIO. Each facility is described below, and is identified

by a reference number.

INPUT - CHANNEL PATH

1. MICROPHONE INPUT

The Microphone input is via a standard female XLR-3

connector and is available when the LINE switch is re-

leased. It is designed to accept a wide range of

balanced or unbalanced low impedance input signals.

2. +48V PHANTOM POWER

Each microphone input can provide the +48V neces-

sary for phantom-powered mics and this may be

turned on or off with the +48V switch.

NOTE: The microphone should always be plugged in

before switching the +48V on or off. Also you should

be aware that some microphones draw an unusually

large current which may overload the power supply, re-

sulting in distortion. Consult your microphone supplier

for guidance if necessary.

Transformer-coupled dynamic microphones may be

used without causing damage, even when the +48V

power is connected, but care must be taken when us-

ing unbalanced sources, because of the voltage

present on pins 2 and 3 of the XLR connector.

3. INSERT

The INSERT is a break point in the input channel signal

path. It allows the signal to be taken out of the mixer,

through an external piece of equipment and then back

into the mixer to continue through to the final output.

The Insert is a 3-pole

⁄

" A gauge Jack Socket, which

is normally by-passed. When a jack plug is inserted,

the signal path is broken at a point just before the MID-

EQ section. When the HF/LF EQ is switched into the

Page 10

channel path (see section 9) the insert is after that sec-

tion, allowing equalisation of both the insert send and

return. The signal from the channel appears on the TIP

of the plug and is returned on the RING. The insert

point allows limiters, compressors and other signal

processing units to be added as required to particular

input channels.

4. LINE INPUT

The LINE Input is a

⁄

" 3 pole Agauge jack socket, to

accept balanced or unbalanced line level sources when

the LINE switch(5) is pressed. Unlike the low imped-

ance Microphone input, this stage presents a high

impedance(>10kΩ) to the input signal, enabling many

types of instruments to be plugged straight in without

D.I. boxes or external preamplifiers.

Line inputs will be useful as extra Effects Returns,

where additional post-effect equalisation is required.

5. LINE SELECT

The LINE switch selects Line input when pressed, and

Microphone input when released. When Line is se-

lected the Gain range is reduced by 20dB(see 6 below).

6. GAIN CONTROL

When the Microphone input is selected this control acts

as a SENSITIVITY control covering a 50dB range. Chan-

nel signal level increases as the control is turned

clockwise. When the Line input is selected it serves as

a GAIN control, with the scaling reduced by -20dB from

the printed scale. There is a line-up mark at the Line in-

put unity gain point. Some audio equipment,

particularly that intended for domestic use, operates at

a nominal -10dBV level and an increased Gain setting

will be required.

7. CHANNEL/MONITOR INPUT REVERSE

Normally the input to the Channel is the Mic/Line

source, while the input to the Monitor path is the tape

return. The CHANMNTR INPUT REV switch swaps over

these inputs, allowing the tape return signal to be

brought down the full facilities of the Channel path dur-

Page 11

ing mix-down using the long-throw channel fader. This

frees the Monitor path to serve as an extra input. Note

that the equalisation section and auxiliary sends are

both split to serve both signal paths.

8. DIRECT

The DIRECT switch replaces the feed to the tape send

jack socket (which is normalled to the Group output)

with the channel post-fade signal. This allows direct re-

cording to a tape track from the channel, under the

control of the main channel fader. Note that the Tape

Send is factory-set to give a -10dBV output, even

though the Group output socket is +4dBu. To change

the Tape Send level to +4dBu see Selectable Options

on Page 32)

9. HF/LF EQUALISER

The Equaliser(EQ) is configured as two separate sec-

tions, to allow both the Channel and Monitor paths to

be provided with a useful range of equalisation simulta-

neously. The HF/LF EQ is usually in the Channel path,

unless the EQ to MNTR switch (10) is pressed. HF and

LF are shelving controls, providing a 15dB boost or

cut.

20.0

15.0

10.0

5.0

0.0

-5.0

-10.0

-15.0

-20.0

1k 10k 20k

100

Frequency/Hz

LF Section

20.0

15.0

10.0

5.0

0.0

-5.0

-10.0

-15.0

-20.0

1k 10k 20k

100

Frequency/Hz

HF Section

Frequency Response Curves of the Equaliser

Page 12

10. EQ TO MONITOR

As mentioned above, the HF/LF EQ section is usually

in the Channel path. Pressing EQ TO MNTR switches

these controls to the Monitor path, while leaving the

HIGH MID and LOW MID controls in the Channel path.

11. HIGH AND LOW MID SWEEP EQ

The HMID and LMID EQ controls are usually in the

Channel path, and by careful choice of frequency limits

provide a comprehensive range of equalisation. The

two pairs of knobs are arranged as a CUT/BOOST con-

trol (lower knob) of +/-15dB and a SWEEP (frequency)

control which determines at which frequency the

boost/cut action will be centred. The HMID control

covers a range from 500Hz to 16kHz, and the LMID

control covers a range from 50Hz to 1.6kHz.

Note that when the CHANMNTR INPUT REV switch (7)

is pressed this section, along with the rest of the Chan-

nel path controls, are fed by the Tape Return signal.

12. AUXILIARY SENDS

These controls route the input channel signal to any

one or more Auxiliary busses. These are separate

20.0

15.0

10.0

5.0

0.0

-5.0

-10.0

-15.0

-20.0

1k 10k 20k

100

Frequency/Hz

LOW MID Section

Frequency Response Curves of the Equaliser

20.0

15.0

10.0

5.0

0.0

-5.0

-10.0

-15.0

-20.0

1k 10k 20k

100

Frequency/Hz

HI MID Section

Page 13

from the main outputs and can therefore provide addi-

tional outputs for foldback or external processing units.

The six Auxiliary busses are arranged in two sections

of three, with each section comprising a pre-fade Fold-

back (FB) send and two post-fade, post-cut switch

auxiliary sends. Normally FB1 and AUX 1 & 2 are in

the Channel path, while FB2 and AUX 3 & 4 are in the

Monitor path.

13. CHANNEL PAN

The Pan control determines the position of the Channel

signal within the stereo image. Rotation fully anticlock-

wise feeds the signal solely to the Left mix buss and

odd-numbered Groups, while rotation clockwise

sweeps the image to the Right and even-numbered

Groups.

14. CHANNEL PFL/PEAK LED

When the PFL switch is pressed, the Pre-Fade signal is

fed to the Control Room and headphones outputs,

where it replaces the selected source. The PFL/AFL

LED on the master section illuminates to warn that the

monitor and the meters are now responding to the

PFL/AFL selection and the PFL LED on the input chan-

nel lights to identify the active channel. This is a useful

way of listening to any required input signal without in-

terrupting the main mix, so that adjustments can be

made or problems traced.

When the PFL switch is released the LED on the chan-

nel serves as a PEAK indicator, to warn when an

excessively high signal level is present in the channel.

The signal is sampled at two points in the channel,

PRE INSERT, (PRE HF/LF EQ if in the Channel path),

and POST EQ. The Peak LED will illuminate approxi-

mately 4dB before clipping and therefore give warning

of a possible overload even if the peaks are removed

by external equipment plugged into the Insert.

15. CHANNEL ON

This switch routes the Channel signal to the Channel

PAN control and then to the routing matrix. It is posi-

tioned post-fader to ensure minimum system noise

when released, while leaving the pre- fade foldback

sends enabled.

Page 14

16. MIX & GROUPS 1-8

The input channel signal is routed to the main STEREO

mix (MIX) or to the GROUPS as stereo pairs (1-2, 3-4, 5-

6, 7-8) as selected by these switches.

17. CHANNEL FADER

This long-throw fader determines the proportion of the

channel in the mix and provides a clear visual indica-

tion of channel level. Normal operating position is at

the 0 mark, providing 10dB of gain above that point if

required.

INPUT - MONITOR PATH

18. TAPE SEND & RETURN

The TAPE SEND is normally fed from one of the 8

GROUP outputs. These are repeated across each 8

channels, e.g. Group 1 feeds Tape Sends 1,9,17 and

Group 2 feeds Tape Sends 2,10,18 etc. When the DI-

RECT switch (8) is pressed the Tape Send receives

only that channel output instead.

The electronically balanced TAPE RETURN is the nor-

mal input to the MONITOR path but is swapped to the

Channel path when CHANMNTR INPUT REV (7) is

pressed.

19. TAPE TRIM

This centre-detented control provides -10dB to +20dB

of gain trim on the Tape Return input. Note that the

centre-detented position is the line-up point for +4dBu

type Tape Machines. For matching -10dBV machines

the control will need to be reset to about the 3 oclock

position.

20. AUXILIARY SENDS (see 12 above)

The MONITOR path normally has a pre-fade Foldback

(FB2) send, and two post-fade Auxiliary sends (AUX

3,4) as described for the Channel path. AUX 3 & 4 may

be switched to the Channel path by the CHAN switch if

required.

Page 15

21. AUXILIARIES TO CHANNEL

FB2 and AUX 3 & 4 are normally in the Monitor path.

Pressing CHAN routes AUX 3 & 4 to the Channel path,

while FB2 remains unaltered.

22. MONITOR PAN

The Monitor PAN control determines the position of the

signal within the stereo image. Rotation fully anticlock-

wise feeds the signal solely to the Left mix buss, while

rotation clockwise sweeps the image to the Right.

23. MONITOR FADER

This rotary control determines the overall level of the

Monitor signal path. Unity gain point is at approximately

7.5 on the scale.

24. MONITOR PFL/PEAK LED

When the PFL switch is pressed, the Pre-Fade signal is

fed to the Control Room and headphones outputs,

where it replaces the selected source. The PFL/AFL

LED on the master section illuminates to warn that the

monitor and the meters are now responding to the

PFL/AFL selection and the PFL LED on the input chan-

nel lights to identify the active channel.

When the PFL switch is released the LED on the chan-

nel serves as a PEAK indicator, to warn when an

excessively high signal level is present in the Monitor

path. The signal is sampled at two points in the Moni-

tor path, PRE FADE (PRE HF/LF EQ if in the Monitor

path). The Peak LED will illuminate approximately 4dB

before clipping.

25. MONITOR ON

The Monitor path is disabled unless the ON switch is

pressed - except FB2 which is always active. The

switch is post-fade to minimise system noise when

OFF.

GROUP SECTION

Page 16

26. GROUP FADERS

Long-throw master faders for each Group. Unity gain is

at the top of their travel.

27. GROUP OUTPUTS

The output from each Group is driven by a ground-

compensated amplifier and fed to standard

⁄

" 3 pole

A gauge jack sockets.

28. GROUP INSERTS

These allow external processing equipment to be in-

serted into the Group signal path. The

⁄

" 3 pole A

gauge jack sockets are by-passed except when a plug

is inserted.

29. PFL

When the PFL switch is pressed, the pre-fade Group

signal is fed to the Control Room Monitors and Head-

phones, where it replaces the selected source. The

PFL/AFL LED on the master section illuminates to

warn that the monitor and the meters are now respond-

ing to the PFL/AFL selection and the PFL LED on the

Group lights to identify the active Group.

30. SUBGROUP MIX/MONO

The MIX switch routes the Groups as odd and even

pairs to the stereo Mix, or if the MNO switch is pressed

the groups are fed equally to both sides of the stereo

Mix.

31. BARGRAPH METERS

A 16-segment, three colour bargraph meter provides

visual monitoring of output level for each Group. The

meter is factory set to a PEAK characteristic, but may

be changed internally to a VU characteristic. Please re-

fer to the Selectable Options section (Page 31) for

details.

Page 17

The bargraphs may be calibrated by trimmers fitted on

the edge of the PCBs and accessed via holes in the

panel above each meter. Adjustments may be made

using a small screwdriver, taking care not to damage

Frequency Response Curves of the Equaliser

20.0

15.0

10.0

5.0

0.0

-5.0

-10.0

-15.0

-20.0

1k 10k 20k

100

Frequency/Hz

LF Section

20.0

15.0

10.0

5.0

0.0

-5.0

-10.0

-15.0

-20.0

1k 10k 20k

100

Frequency/Hz

HF Section

the trimmers.

32. AUXILIARY MASTER

Each of the Auxiliary Send busses is provided with a

rotary master level control and an AFL switch with indi-

cating LED which monitors the final output after the

fader.

33. AUXILIARY OUTPUT

The Auxiliary Send output is driven by a ground-com-

pensated amplifier to a standard

⁄

" 3 pole A gauge

jack socket.

34. STEREO EFFECTS RETURN

Four Stereo Effects Returns are provided on pairs of

⁄

3 poleA gauge jack sockets, to allow external equip-

ment to be returned to the mixer and routed to the

stereo Mix or Groups, without using up valuable input

channels. A mono signal may be plugged into either

socket of each pair to be fed equally to left and right

busses. The Effects Returns are electronically bal-

anced.

35. TRIM

Each pair of Effects Returns has a centre-detented TRIM

Page 18

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SoundCraft Audio Mixing Console Model Spirit Studio User manual

Brand: SoundCraft

Model: Audio Mixing Console Model Spirit Studio

Category: Musical Instruments

Type: User manual

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SoundCraft Audio Mixing Console Model Spirit Studio User manual

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SoundCraft Audio Mixing Console Model Spirit Studio User manual

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